Pressure-regulating and shut-off valve combined.



C. D. MILLER.

PRESSURE RBGULATING AND SHUT-OPP VALVE COMBINED.

APPLIOATIONQ FILED JUNE 1, 1909.

Patented Sept.28,1909.

INVENTOR. 04% J; 77% BY ATTORNEY.

unirnn STAT GosBYnMILLER, ors'r. JOSEPH, mrssonnr.

- Specification of Letters Patent.

Patented Sept. 28, 11909.

' Application filed June 1,' 1909. Serial No. 499,556.

To allwhom it may concern:

Be it known that I, CosBY D. MILLER, a citizen of the United States, residing at St. Joseph, in the county of Buchanan and State of Missouri, have invented certain new and useful Improvements in Pressure-Regulating and Shut-Off Valves Combined, of which the following is a specification, reference being had therein to the accompanying drawing.

My invention relates to improvements in pressure regulating valves and shut oil'- valves, and the objects of my improvements are, first; to combine on one valve stem, op-; erated by one diaphragm, a pair of valves, one of which shall automatically act as an eflicient pressure regulating valve, for clos-' ing a valve opening, and reduce a high, sup-= ply pressure of gas or liquid, to a constant predetermined service pressure, in its flow, through said valve opening; while the other; one of said valves automatically acts as an efficient shut-off valve, and shuts oif said flow of gas or liquid, when the pressure of same is lowered to a certain predeterminedv low pressure, lower than said service res-g sure, and thereafter continues to shut 0 said flow, until said shut-off valve is manually opened; second; to so construct a pressure regulating and shut-off valve combined, that the moving parts thereof shall be operated by said pressure of gasa'nd by gravity, with-5 out the use of springs, and the like; he posi-@ tive and extremely sensitive in their action, be simple in construction, durable, not at all liable to get out of working order, be neat in appearance and extremely cheap in cost of manufacture. I. attain these objects by the mechanism illustrated in the accompany ing drawing, in which Figure 1. is a longl Fig. 2. is a. trans verse section cut vertically through'the cen-:

her 7 and diaphragm chamber 1.

tudinal section, vertically through thefcent'er of all the parts, showing both valves open.

on the outer edge thereof. Said diaphragm holder is also provided with concaved recess 2, formed in the central portion of its lower surface, and has aperture 3 and port opening 9 through the bottom thereof. valve body 4, has valve chamber 5, formed therein, and the screw threaded inlet opening 6, leading into-said valve chamber. Said valve body is also provided with valve opening 7,

outlet chamber 7, and screw threaded outlet opening 8, leading from said valve chamber. In the wall 10, of Valve body 41, is the port 9, which connects with aperture 9 and forms communication between outlet champhragm holder 1' and valve body 4, have the outer edge portion of second diaphragm 11, placed between them, and are secured together by cap screws 12', seen in Fig. 2.

. Said diaphragm provides closing means for at all times closing aperture B, in suchmanner as will allow stem guide 18 to be sensitive to every impulse, and move with perfect freedom in said aperture. Said second diaphragm also provides elastic packing forfl' 30 the contacting surfaces of said valve body and diaphragm holder, thereby rendering unnecessary, the machining of said surfaces,

: and: thus cheape'ning the cost {of manufacturing said parts. Covering diaphragm chain-e35 her 1, and with its edge resting on flange .1, is diaphragm 13-, on' the edge of which rests the annular flange 14 of the diaphragm cover 14; said flanges being secured together by bolts and nuts 15. Said cover has -go aperture 16, formed therethrough, of ample size to admit bolt '17,, and to permit free --passage of air therethrough; iThp-revioasly mentioned stem guide 18 hasitslower por-, tion guidedin aperture 3 and its upper por-.1; s5

tion' contacting the under. surface of -phragm2 13, which together with shut-elf -weight,1;9, on. the vupper surfa ceof -said I diaphragm, are secured together by having valve stem 20, provided with flange 20'1'1001 diaformed thereon, passed upward through the centers of second diaphragm 11, stem guide 18- and shut-elf weight 19, with flange 20 beneath said-second diaphragm, and the upper screw threaded portion of said stem screwed'into the lower end of bolt 17 which also thereby secures said valve stem, the central portion of diaphragm: 11 and said steam guide together. Both of said dia'phragms are formed of such flexible material: as is.,110

adapted to withstand the action of the liquids and gases, which are to pass through said valve.

Secured on the lower end of valve stem 5 20, in outlet chamber 7, is the pressure regulating valve 22, adapted to contact the lower side of valve opening 7, and close said opening. In, cover 14 is the pressure regulating weight 23, provided with central aperture 23, through which loosely passes the bolt 17. Said weight also has slots 23", formed in the outer periphery thereof. Screws 24, provided with slots 24 in their upper ends are loosely passed upward, "through slots 23", screwed through cover 14, the heads 'of which act as adjustable supports for weight 23; which are adjusted by an ordinary.

screw driver, not shown inserted inslots 24, for turning said screws, until weight 23 is thereby brought to the position seen in Fig. 1., with valves 21 and 22, both in open position; after which said adjustment of screws 24 is secured by lock nuts 25, as seen.

It will be seen that the diameter of aperture 3 is greater than the diameter of the lower portion of stem guide 18, which moves therein, and that apertures 16 and 23', are .of greater diameter than bolt 17 thereby providing loose guidin -means, wherein saidstem guide and said olt, move upward and downward with perfect freedom; thus pro- -vi'd1ng a pressure regulating valve and shutoff valve combined, of extreme sensitiveness, and which will be operated with certainty, by gas or liquid under anypressure, even though said pressure be extremely low. It will be further seen and understood, that should the alinement of valve opening ,7 and valves 21 and 22 and their attached parts be imperfect, said valves, by reason of their semispherical form, will be laterally guided and moved by said opening when pressed against the same, to a'perfect seat, closing said opening; and that said loose guiding means-and second diaphragm 11,. in no way retard said lateral movement of said valves.

In voperation, with the. parts in the position seen in Fig.1.; gas, under high, supply pressure is admitted through'inlet opening through valve opening 7 into outlet cham-. ber' 7', thence through outlet opening 8 into such service system, not shown, as" may be connected therewith, As the' pressure of said gas accumulates in chamber 7 said gas passestherefrom, through port 9 and aperture 9,', into diaphra' m chamber 1', beneath dia hragm- 13, winch supports shutoff weightl held down by pressure regulating weight 23,'which is made of such amount as is required to be overcome and he lifted by ,a certain predetermined service pressure of said gas. When said-gas has had-its presstire raised beneath diaphragm 13 to said as service pressure, said diaphragm is lifted 6, into valve chamber 5, and flows therefrom,

thereby, and moves all the moving parts, including pressure regulating valve 22, from the position seen in Fig. 1., to theposition seen in Fig. 2.; thus closing valve opening 7, which position of parts is maintained, until pressure of gas in outlet chamber 7 becomes lower than said service pressure, whereupon weight 23 gravitates and moves the parts to the position seen in .Fig. 1., with weight 23 supported on the heads of screws 24; which latter position again admits high pressure of gas, as described, upon which the described operation is repeated, and so continues while gas 1s used through outlet 8. Thus providing an .eflicient pressure regulating valve, as stated in the ob ects.

It will be understood that shut-off weight I '19 is made of the required amount to overcome any certain predetermined low pres sure of gas, beneath diaphragm 13, and gravitate, as hereinafter described. Said low pressure, in the use of gas, would be such pressure, lower than said service pressure, as

would render uncertain, the burning- 0f gas, in any gas burner.

It will be seen and understood from the foregoing, that so long as any pressure of gas from said service pressure, down to said low pressure is maintained in chamber 1,

beneath diaphragm 13, shut-off weight'19 is thereby held upagainst pressure regulating weight 23, with 'the parts in position seen in Fig. 1., and when from any cause, .said pressure of gas goes below said low pressure, shut-01f weight 19 gravitates and moves the parts attached thereto, including valve,21, to the position seen in Fig. 1. closing valve opening 7. It wil be further seen and understood, that upon the return of said high, supply p're'ssure,-or in fact any pressure of as',1n valve chamber 5, throughinlet openmg 6,.shut-oif valve 21 prevents any of said returned pressure of gas from entering outlet chamber 7 port 9 and chamber 1,-and that shut-ofi" weight, .for this reason,,hold s valve "21 closed, in shut-off position, until weight. 19 and its attached parts are man ually raised by bolt 17 from the position seen in Fig. 3 to theposition seen 1I1 Fig. 1.; v -The described automatic closing of shutsame inlsaid shut ofl position, prevents the casualties, incident to the return of pressure of gas to said service system, after said pres- Whlle I h dent 'tha't' pressure regulating we' ht 23 could be made of various forms and sup orted in a variety of ways, without departmg from the int of my'invention; one of off valve 21, and the continued retention of- 1 such various orms of-said weight and its SERElFOI'CS lJGiIIg shown in Fig. 4, in which 3- weight is provided with annular flange 23, formed therewith, adapted to be supported upon that part of diaphragm 13, which is supported on the inward extension 1* of flange 1.

Having fully described my invention, what I claim' as new and desire to secure by Letters Patent is 1. In a pressure regulating and shut-off valve combined, the combination of a valve body, provided with a valve chamber therein, an inlet opening leading into said valve chamber, a valve opening, an outlet cham-.

ber and an outlet opening leading from said Valve chamber, a pressure regulating valve in said outlet chamber, adapted to be drawn against the lower side of said valve opening, for closing the same; a shut-off valve in said valve cham er, adapted to be pressed on the upper side of said valve opening, for closing the same, and a valve stem passin through said valve opening and having sai valves secured thereon; sald valve stem being provided with a flange formed thereon and with an upper screw threaded portion, a diaphragm holder, having a diaphra m chamber therein; a diaphragm cover or covering said diaphragm, said cover being provided with an aperture through the center thereof; a pressure regulating weight of predetermined amount in said cover, said weight being adapted to be moved upward and downward therein supporting and guiding means adjustably secured in said cover,

whereby said regulatin weight is supported and guided; a shut-o weight of predetermined amount, on said diaphragm, under said regulating weight; a stem guide under said diaphragm, and securing means whereby said shut-off weight, said diaphragm and said stem guide are securedtogether, a second diaphragm, the outer edge of which is secured between said valve body and said diaphragm holder, and securing means, whereby said valve stem the central portion of said second diaphragm and said stem guide are secured together; and communi-' eating means through the wall of said valve body and the bottom of said diaphragm holder, for communicatively connecting said outlet chamber with said diaphragm chamber.

2. A valve of the character described,comprising a valve body, having a valve chamber and an outlet chamber therein, and 'a valve opening communicating with both of said chambers, an inlet opening for said valve chamber and an outlet opening for said outlet chamber; a diaphragm holder, having a diaphragm chamber therein and an aperture through the center of the bottom thereof; a diaphragm, secured on said dia hragm holder; a shut-ofl' weight on said diaphragm; a shut-off valve 1n said inlet chamber; a in said outlet cham er and connecting means through said valve openin through said valve chamber, and throug said aperture in said diaphragm holder, whereby said valves, said diaphragm and said shut-off weight are connected; a. second'diaphragm for closing said aperture in said diaphragm.

holder around said connecting means, the outer edge of said second diaphragm being between said valve body and said dlaphragm holder and provided with securing means, whereby said valve body, said second diaphragm and said diaphragm holder are secured together, and securing means, whereby the central portion of said second diaphragm is secured to said connecting means, a pressure regulating weight, above, and adapted to beli ted by said shut-ofl' weight and supporting and iding means, whereby said regulating welght is supported and ided; communicating means, whereby sai outlet chamber and said diaphragm chamber are communicatively connected, and lifting means, whereby said shut-ofi' weight and its attached parts can be manually lifted.

In testimony whereof I aflix my signature in the presence of two witnesses.

cosBY D. MILLER.

Witnesses:

JAMES M. ROGERS, JOHN J. HINTON. 

